Ventilating apparatus



R. A. [LG

VENTILATING APPARATUS Filed Aug.

Feb. 10. 1925.

I To e yf 9J', BYQSM 074,61

ATTORNEY Patented Feb. 10, 1925.

UNITED sTATEs 1,525,649 PATENT OFFICE.

ROBERT A. ILG, OF CHICAGO, ILLINOIS, AssIGNOR To ILG ELECTRIC VENTILATING COMPANY, on CHICAGO, ILLINOIS, A CORPORATION OF LOUISIANA.

VENTILATING APPARATUS.

Application led August 4, 1924.` Serial No. 729,888.

To all whom t may concern.'

Be it known that I, ROBERT A. ILC, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ventilating Apparatus, of which the following is a specifi- 1n the wall of the building, a series of hori' zontal gravity closing shutter vanes pivoted in said frame and connected for simultaneous opening and closing movements, and a motor driven fan mounted opposite said vanes and, when in operation, openin the latter by the blast of air created there y.

It has been found in practice that when the fan is idle, the automatically closing hinged shutters are apt to rattle more or less and become noisy through the influence of the external winds or natural drafts of air from within the room, and the purpose of my present invention is to pro-vide an improvement on Ventilating apparatus of this type which will effectively check this annoyance through means by which the shutter varies, when closed, are automatically locked in closed position, but are released and permitted to open by the blast of air delivered by the fan when the latter is started in operation.

My present invention, its mode of operation and the advantages inhering therein will be readly understood by personsskilled in the art from the following detailed description taken in connection with the accompanying drawings wherein I have shown one practical and approved embodiment of the principle of the invention, and in which- Fig. 1 is an inner side elevation of the frame and shutters showing my improved locking device in shutter locking position;

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1; Fig. 3 is a vertical section, including a fragment of the wall, with the locking device in release position and the shutters open, and also showing the fan and its motor; and

A and, furthermore, lessen the efficiency of the Fig.4 4 is an enlarged scctionaldetail on the line 4-4 of Fig. 1 through the pivot of the locking device.

Referring to the. drawing, 5 may he assinned to represent the external wall of a room to be ventilated, the same having an opening 6 formed therein, over which on the outer side of the wall is secured a rectangular metal shutter frame 7. In and between the opposite vertical members of the frame 7 are mounted on horizontal spindles 8 a group of shutter vanes 9. These vanes are connected for simultaneous opening and closing movements by levers 10, one arm of each lever lying in a pocket 11 formed on the rear side of the shutter vane and its other arm being pivoted to a vertically disposed link or shift rod 12 lying inwardly Of one vertical side wall of the frame 7. To the inner side of the building wall 5 is secured a frame 13 in which is mounted an electric motor 14, the shaft of which carries a direct driven Ventilating fan 15.

The shutter mechanism thus far described is identical with that disclosed and claimed in my former Patent No. 1,482,398, above referred to, to which patent reference may be had for a fuller and more detailed de'- scription.`

As previously stated, it has been found f that when the fan is idle and the shutters closed outside winds or interior drafts tending to flow through the opening cause the shutters to rattle and thus become noisy,

shutters as a closure for the Opening guarded thereby; and by my present invention I provide a very simple and efficient automatic locking mechanism which, when the shutters swing to closed position. locks and holds them in such position; but, when the fan is started in Operation, is released by the fan, preferablyby the blast of air created hy the latter, so that the shutters may readily swing to Open position to allow the Outiiow of theI current of air drawn oft from the room by the action Of the fan.

Describing this locking mechanism, in the upper transverse member of the frame. 7 is mounted a pin 16 (Fig. 4), on which is rotatably mounted a metal sleeve 17 secured in place by a cap screw 18 entering the free end of the pin 16. Soldered or otherwise secured on the bearing sleeve 17 is a rod 19 formed On one side of its pivot bearing 11o with adepending limb 20 terminating in an outwardly directed locking point or pin 20 that, in the closed position of the shutter vanes illustrated in Figs. l and 2, enters a hole 2l in the link or shift rod 12, and on the other side of its pivot bearing with a. downwardly inclined shank portion 22 that is riveted, soldered` or otherwise secured to a downwardly and inwardly inclined Hat metal strip or -vane 523, the outer edge ot which lies close to and substantially in contact with the inner surfaces of the vanes 9. The shank QQ and vane 23 are heavier than the arm 2O and its locking point 20 on the other side ol the pivot acting as a counterweight to urge the pin 20 into locking position. so that, when the shutter vanes are closed` the gravity eii'ect .ot the vane 23 forces the locking point or pin 20 into the hole 2l of the link l2, as shown in Fig. l, whereby the shutter vanes 9 are locked in closed position. l

When the tan is started, however, the blast ot' air delivered by the latter, striking against. the inner surfaces of the .closed shutter vanes. is partly caught or pocketed beneath the rane 23 ot the locking member, 'ausing the same to Swing upwardly substantially to the position shown in Fig. 3. This instantly retracts the locking pin or point 20 from the hole in the link l2, and allows the shutters to open and permit the passage. of the current of air, as clearly shown in Fig. 2. The. instant the fan stops, however. the shutter vanes drop by gravity to closed position, and the vane 23 of the locking device, by its gravity elieetfcauses the locking point or pin 20 to instantly reengage with the aperture in the shutter controlling link l2. l

It will thus be seen that my invention provides a very simple automatically acting device for locking the shutter vanes in their closed position against vibration and rattling. which locking device is released by the blast of the tan, but automatically returns to locking position by gravity the instant the fan ceases to operate.

While I h ave herein shown and described one simple and practical instrumentality by which the purpose or object ot the invention may be carried ont. it is manifest that the specific details ot structure may be varied from those shown and described without departing from the substance ot the invention or sacrificing any of the advantages thereof. Hence. I reserve al1 such variations and modifications as fall within the spirit and purview of the appended claims.

I claiml. In a Ventilating appliance, the combination ot a frame, a group of shutter vanes hinged in said frame, a' fan mounted opposite said vanes and serving to open the latter by the air blast created thereby, means for locking said vanes in closed position, and means. actuated by said fan when in operation for releasing said locking means.

2. In a Ventilating appliance, the combination of a frame, a group of shutter vanes hinged in said frame, a fan mounted opposite said vanes and. serving to lopen the latter by the air blast created thereby, automatic means for locking said vanes in closed position, and means actuated by the blast ot said tan for releasing said locking means.

3. In a Ventilating appliance, the combination of a frame, a group of shutter vanes hinged in said trame, al fan mounted opposite said vanes and serving to open the latter by the air blast created thereby, levers connected to said vanes respectively, a link connecting said levers for simultaneous movements, means for locking said link against movement When said vanes are in closed position, and means actuated by the blast of said tan for releasing said locking means.

4. In a Ventilating appliance, the combination of a frame, a group of gravity closing shutter vanes hinged in said frame, a fan mounted opposite said vanes and serving to open the latter by the air blast created thereby, levers connected to said vanes respectively, a link connecting said levers tor simultaneous movements and formed with a locking hole, a locking pin automatically engaged in said hole when said vanes are in closed position, and means actuated by the blast ot said fan for retracting said locking' pin.

5. In a Ventilating appliance, the combination of a frame, a group of gravity closing shutter vanes hinged in said frame, a fan mounted opposite said vanes and serving to open the latter by the air blast created thereby, levers connected to said vanes respectively, a link connecting said levers for simultaneous movements and formed With a locking hole, and a pivoted locking pin equipped with a counterweight urging said pin into engagement with said hole when the said vanes are closed, said counterweight being raised to retreat said pin by the blast of said tan when the latter is in operation.

ROBERT A. ILGr. 

